| Author | Message | < PIC Project ~ Two Keyboards on one PC | | eric | | Posted: Sun Aug 27, 2006 10:42 am Post subject: Two Keyboards on one PC | | | | Site Admin Joined: 01 Jan 1970 Posts: 311 | This circuit does the exact opposite of what most
of this type of changeover switches attempt to
do. Usually a changeover switch is used with two
PCs and one keyboard. This version however
makes it possible to operate one PC with two
keyboards. K1 is connected to the PC for this purpose
while K2 and K3 are connected to two keyboards.
The data outputs of the keyboards are high in the
idle state. As soon as a key is pressed the keyboard
will serially transmit the data. The data line
will now also be low from time to time. This low
level is detected and remembered by the flip-flop
circuit around IC1.
If the signal originates
 | |
|
|
| Back to top | |
All times are GMT
Audio power, headphone and pre Amplifier, Digital audio circuits, Loudspeakers projects
PLC articles, examples, hardware, hints and tips, software
SitemapPowered by phpBB // Template by Mike Lothar | 
